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Step-by-step explanation:
a ) 2 power 8 × 7 cube divided by 8 power 2 × 7
= 2 power 8 × 7 power 3 - 1 i.e 2 divided by 2 power 2 × 4 power 2
= 2 power 8 - 2 i.e 6 × 7 power 2 divided by 4 power 2
b ) 11 cube × 5 cube divided by 11 squared × 5
= 11 power 3 - 2 i.e 1 × 5 power 3-1 i.e 2
c ) answer is 1
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